I've done it twice in the past. I had a great time.
The short loop is kind of a rolling party. Flat with several stops and lots of costumes.
The challenge loop is a decent ride with a fair amount of climbing.
"The older you do get, the more rules they're gonna try to get you to follow. You just gotta keep livin', man, L-I-V-I-N." - Wooderson
'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur